Tetrahymena cells that are not forming a digestive vacuole often have a tube-like extension of the cytopharyngeal membrane attached to the deep fiber that extends several microns into the cytoplasm. T...

High resolution image of the nucleoli of the macronucleus. Nucleoli have a core of DNA that contains the genes that are transcribed into ribosomal RNA. Assembly of the ribosomal subunits from this pro...

Mucocysts have a herringbone pattern of subunits and are surrounded by a membrane that fuses with the plasma membrane. When the mucocyst content is extruded the content expands (see Hausmann, Protisto...

A High resolution micrograph of tetrahymena showing a transverse ribbon starting from the anterior right side of the proximal end of a basal body (out of section plane) and crossing under the pellicle...

A tangential section through the buccal cavity showing the close spacing of the cilia in the undulating membrane and 3, presumably nonciliated basal bodies, in the inside row. Accessory microtubular r...

A view of the cortex showing early endosomes are often cup shaped and can have several coated evaginations arising from the rim of the cup. TEM taken on 8/10/65 by R. Allen with RCA EMU3F operating at...

Polykinetids of one membranelle of the buccal cavity, probably membranelle 1. Accessory microtubules arise from the row of basal bodies on one side. Parasomal sacs are not seen associated with this me...

The deep fiber is associated with the cytopharyngeal membrane (see Smith and Bunse, Trans. Am. Microsc. Soc. 102:264-271, 1983). This membrane has acidosome-like vesicles docked at its cytosolic surfa...

The two CV pores of a cell. An impression of the helically wound microtubules are detectable in the right pore. TEM taken on 4/21/78 by R. Allen with Hitachi HU11A operating at 60kV. Neg. 21,750X. Bar...

The two CV pores of a cell. An impression of the helically wound microtubules are detectable in the right pore. TEM taken on 4/21/78 by R. Allen with Hitachi HU11A operating at 60kV. Neg. 21,750X. The...